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P l a t e CXXVIL
RHODYMENIA CILIATA, Grev.
G e n . C h a e . Frond flat, membranaceous or subcoriaceous, ribless, veinless,
cellular; central cells of small size; those of the surface minute.
Fructification of two kinds on distinct individuals; 1, convex tubercles
[coccidia) having a thick cellular pericarp, and containing a mass of
minute spores, on a central placenta. 2, tetraspores, either zoned or
tripartite, imbedded among the ceUs of the surface, scattered, or forming
cloudy patches. R h o d y m e n i a [Orev.],—^from pobeos, red, and
bnv, a rmnJ)rane.
R h o d ym e n ia ciliata-, frond thick, subcartilaginous, dnU purplish-red,
rising from a short stalk, lanceolate or forked, irregularly pinnated
with lanceolate or bifid segments, which are attenuated at base ; the
margin, and often the disc, more or less furnished with subulate ciba,
in which the tubercles are imbedded ; tetraspores collected in cloud-
like patches dispersed over the disc ; root branching.
Rhodymenia ciliata, Grev. Alg. Brit. p. 90. Hook. Br. FI. vol. ii. p. 291.
Wyatt, Alg. Banm. no. 67. Earv. in Mack. Fl.HiJt. part 3. p. 194. Haro.
Man. p. 62. Endl. ir d Suppl. p. 51.
Cal lib l eph a e is ciliata, Kiitz. Pliyc. Gen. p. 404. t. 62, III.
-De le sse eia ciliata, Lamour. Ess. p. 37.
H alymenia ciliata, Gaill. Bict. So. Nat. v. 53. p. 361.
S p h i e e o c o c c u s cihatus, 5'y». p. 28. Lyngb. Hyd. Ban. p. 12. t. 4:. Ag.
Sp. Alg. vol. i. p. 263. Ag. Syst. p. 221 Spreng. Syst. Veg. vol. iv. p. 334.
Hook. El. Scot. part 2. p. 103,
Fucus ciliatus. Limi. Mont. PI. p. 136 and 519 (enccl. syn. Gmel.). Syst. Nat.
p. 718. Huds. FI. Ang. p. 580. Ligldf. FI. Scot. p. 944. Stack. Ner.
Brit. p. 90. t. 15. Turn. Syn. vol. i. p. 169. Sm. E. Bot. 1 .1069. Tiirn.
Hist. Fuc. t. 70. fig. a-e. Linn. Trans, vol. iii. p. 160. Hook. Iceland
Tour. vol. ii. p. 347.
Hab. On rocks, in pools near low-water mark, and at a greater depth.
Annual. Pruiting in winter. Frequent on the shores of England
and of the south and west of Ireland. Near Belfast, B r . Brummond.
Rare in Scotland. Iona, L ig litf. Blwich Harbour and Sliapinsha,
Orkney, L ieu t. Thomas and B r . Me’ B am . Jersey, Miss White and
Geoge. Dis t e . Northern Atlantic Ocean, along the shores of Greenland, Iceland,
the Fceroe Islands, and of Europe from Norway to Spain.
D e sc e . Boot composed of pale red, branching and grasping fibres. Eronds
tufted, six to twelve inches long, rising from a short, cylindrical, simple, or
rarely forked stem, variable iu form. In some individuals the frond forms
a simple, ovato-lanceolate subacute leaf, cuneate at base, and dentato-ciliate
VOL. I I . c